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path: root/drivers/scsi/scsi_error.c
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Diffstat (limited to 'drivers/scsi/scsi_error.c')
-rw-r--r--drivers/scsi/scsi_error.c239
1 files changed, 123 insertions, 116 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 2dce06a58c08..b8edcf5b5451 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -458,6 +458,128 @@ static void scsi_eh_done(struct scsi_cmnd *scmd)
458} 458}
459 459
460/** 460/**
461 * scsi_try_host_reset - ask host adapter to reset itself
462 * @scmd: SCSI cmd to send hsot reset.
463 **/
464static int scsi_try_host_reset(struct scsi_cmnd *scmd)
465{
466 unsigned long flags;
467 int rtn;
468
469 SCSI_LOG_ERROR_RECOVERY(3, printk("%s: Snd Host RST\n",
470 __FUNCTION__));
471
472 if (!scmd->device->host->hostt->eh_host_reset_handler)
473 return FAILED;
474
475 rtn = scmd->device->host->hostt->eh_host_reset_handler(scmd);
476
477 if (rtn == SUCCESS) {
478 if (!scmd->device->host->hostt->skip_settle_delay)
479 ssleep(HOST_RESET_SETTLE_TIME);
480 spin_lock_irqsave(scmd->device->host->host_lock, flags);
481 scsi_report_bus_reset(scmd->device->host,
482 scmd_channel(scmd));
483 spin_unlock_irqrestore(scmd->device->host->host_lock, flags);
484 }
485
486 return rtn;
487}
488
489/**
490 * scsi_try_bus_reset - ask host to perform a bus reset
491 * @scmd: SCSI cmd to send bus reset.
492 **/
493static int scsi_try_bus_reset(struct scsi_cmnd *scmd)
494{
495 unsigned long flags;
496 int rtn;
497
498 SCSI_LOG_ERROR_RECOVERY(3, printk("%s: Snd Bus RST\n",
499 __FUNCTION__));
500
501 if (!scmd->device->host->hostt->eh_bus_reset_handler)
502 return FAILED;
503
504 rtn = scmd->device->host->hostt->eh_bus_reset_handler(scmd);
505
506 if (rtn == SUCCESS) {
507 if (!scmd->device->host->hostt->skip_settle_delay)
508 ssleep(BUS_RESET_SETTLE_TIME);
509 spin_lock_irqsave(scmd->device->host->host_lock, flags);
510 scsi_report_bus_reset(scmd->device->host,
511 scmd_channel(scmd));
512 spin_unlock_irqrestore(scmd->device->host->host_lock, flags);
513 }
514
515 return rtn;
516}
517
518/**
519 * scsi_try_bus_device_reset - Ask host to perform a BDR on a dev
520 * @scmd: SCSI cmd used to send BDR
521 *
522 * Notes:
523 * There is no timeout for this operation. if this operation is
524 * unreliable for a given host, then the host itself needs to put a
525 * timer on it, and set the host back to a consistent state prior to
526 * returning.
527 **/
528static int scsi_try_bus_device_reset(struct scsi_cmnd *scmd)
529{
530 int rtn;
531
532 if (!scmd->device->host->hostt->eh_device_reset_handler)
533 return FAILED;
534
535 rtn = scmd->device->host->hostt->eh_device_reset_handler(scmd);
536 if (rtn == SUCCESS) {
537 scmd->device->was_reset = 1;
538 scmd->device->expecting_cc_ua = 1;
539 }
540
541 return rtn;
542}
543
544static int __scsi_try_to_abort_cmd(struct scsi_cmnd *scmd)
545{
546 if (!scmd->device->host->hostt->eh_abort_handler)
547 return FAILED;
548
549 return scmd->device->host->hostt->eh_abort_handler(scmd);
550}
551
552/**
553 * scsi_try_to_abort_cmd - Ask host to abort a running command.
554 * @scmd: SCSI cmd to abort from Lower Level.
555 *
556 * Notes:
557 * This function will not return until the user's completion function
558 * has been called. there is no timeout on this operation. if the
559 * author of the low-level driver wishes this operation to be timed,
560 * they can provide this facility themselves. helper functions in
561 * scsi_error.c can be supplied to make this easier to do.
562 **/
563static int scsi_try_to_abort_cmd(struct scsi_cmnd *scmd)
564{
565 /*
566 * scsi_done was called just after the command timed out and before
567 * we had a chance to process it. (db)
568 */
569 if (scmd->serial_number == 0)
570 return SUCCESS;
571 return __scsi_try_to_abort_cmd(scmd);
572}
573
574static void scsi_abort_eh_cmnd(struct scsi_cmnd *scmd)
575{
576 if (__scsi_try_to_abort_cmd(scmd) != SUCCESS)
577 if (scsi_try_bus_device_reset(scmd) != SUCCESS)
578 if (scsi_try_bus_reset(scmd) != SUCCESS)
579 scsi_try_host_reset(scmd);
580}
581
582/**
461 * scsi_send_eh_cmnd - submit a scsi command as part of error recory 583 * scsi_send_eh_cmnd - submit a scsi command as part of error recory
462 * @scmd: SCSI command structure to hijack 584 * @scmd: SCSI command structure to hijack
463 * @cmnd: CDB to send 585 * @cmnd: CDB to send
@@ -584,13 +706,7 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, unsigned char *cmnd,
584 break; 706 break;
585 } 707 }
586 } else { 708 } else {
587 /* 709 scsi_abort_eh_cmnd(scmd);
588 * FIXME(eric) - we are not tracking whether we could
589 * abort a timed out command or not. not sure how
590 * we should treat them differently anyways.
591 */
592 if (shost->hostt->eh_abort_handler)
593 shost->hostt->eh_abort_handler(scmd);
594 rtn = FAILED; 710 rtn = FAILED;
595 } 711 }
596 712
@@ -723,31 +839,6 @@ int scsi_eh_get_sense(struct list_head *work_q,
723EXPORT_SYMBOL_GPL(scsi_eh_get_sense); 839EXPORT_SYMBOL_GPL(scsi_eh_get_sense);
724 840
725/** 841/**
726 * scsi_try_to_abort_cmd - Ask host to abort a running command.
727 * @scmd: SCSI cmd to abort from Lower Level.
728 *
729 * Notes:
730 * This function will not return until the user's completion function
731 * has been called. there is no timeout on this operation. if the
732 * author of the low-level driver wishes this operation to be timed,
733 * they can provide this facility themselves. helper functions in
734 * scsi_error.c can be supplied to make this easier to do.
735 **/
736static int scsi_try_to_abort_cmd(struct scsi_cmnd *scmd)
737{
738 if (!scmd->device->host->hostt->eh_abort_handler)
739 return FAILED;
740
741 /*
742 * scsi_done was called just after the command timed out and before
743 * we had a chance to process it. (db)
744 */
745 if (scmd->serial_number == 0)
746 return SUCCESS;
747 return scmd->device->host->hostt->eh_abort_handler(scmd);
748}
749
750/**
751 * scsi_eh_tur - Send TUR to device. 842 * scsi_eh_tur - Send TUR to device.
752 * @scmd: Scsi cmd to send TUR 843 * @scmd: Scsi cmd to send TUR
753 * 844 *
@@ -821,32 +912,6 @@ static int scsi_eh_abort_cmds(struct list_head *work_q,
821} 912}
822 913
823/** 914/**
824 * scsi_try_bus_device_reset - Ask host to perform a BDR on a dev
825 * @scmd: SCSI cmd used to send BDR
826 *
827 * Notes:
828 * There is no timeout for this operation. if this operation is
829 * unreliable for a given host, then the host itself needs to put a
830 * timer on it, and set the host back to a consistent state prior to
831 * returning.
832 **/
833static int scsi_try_bus_device_reset(struct scsi_cmnd *scmd)
834{
835 int rtn;
836
837 if (!scmd->device->host->hostt->eh_device_reset_handler)
838 return FAILED;
839
840 rtn = scmd->device->host->hostt->eh_device_reset_handler(scmd);
841 if (rtn == SUCCESS) {
842 scmd->device->was_reset = 1;
843 scmd->device->expecting_cc_ua = 1;
844 }
845
846 return rtn;
847}
848
849/**
850 * scsi_eh_try_stu - Send START_UNIT to device. 915 * scsi_eh_try_stu - Send START_UNIT to device.
851 * @scmd: Scsi cmd to send START_UNIT 916 * @scmd: Scsi cmd to send START_UNIT
852 * 917 *
@@ -977,64 +1042,6 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,
977} 1042}
978 1043
979/** 1044/**
980 * scsi_try_bus_reset - ask host to perform a bus reset
981 * @scmd: SCSI cmd to send bus reset.
982 **/
983static int scsi_try_bus_reset(struct scsi_cmnd *scmd)
984{
985 unsigned long flags;
986 int rtn;
987
988 SCSI_LOG_ERROR_RECOVERY(3, printk("%s: Snd Bus RST\n",
989 __FUNCTION__));
990
991 if (!scmd->device->host->hostt->eh_bus_reset_handler)
992 return FAILED;
993
994 rtn = scmd->device->host->hostt->eh_bus_reset_handler(scmd);
995
996 if (rtn == SUCCESS) {
997 if (!scmd->device->host->hostt->skip_settle_delay)
998 ssleep(BUS_RESET_SETTLE_TIME);
999 spin_lock_irqsave(scmd->device->host->host_lock, flags);
1000 scsi_report_bus_reset(scmd->device->host,
1001 scmd_channel(scmd));
1002 spin_unlock_irqrestore(scmd->device->host->host_lock, flags);
1003 }
1004
1005 return rtn;
1006}
1007
1008/**
1009 * scsi_try_host_reset - ask host adapter to reset itself
1010 * @scmd: SCSI cmd to send hsot reset.
1011 **/
1012static int scsi_try_host_reset(struct scsi_cmnd *scmd)
1013{
1014 unsigned long flags;
1015 int rtn;
1016
1017 SCSI_LOG_ERROR_RECOVERY(3, printk("%s: Snd Host RST\n",
1018 __FUNCTION__));
1019
1020 if (!scmd->device->host->hostt->eh_host_reset_handler)
1021 return FAILED;
1022
1023 rtn = scmd->device->host->hostt->eh_host_reset_handler(scmd);
1024
1025 if (rtn == SUCCESS) {
1026 if (!scmd->device->host->hostt->skip_settle_delay)
1027 ssleep(HOST_RESET_SETTLE_TIME);
1028 spin_lock_irqsave(scmd->device->host->host_lock, flags);
1029 scsi_report_bus_reset(scmd->device->host,
1030 scmd_channel(scmd));
1031 spin_unlock_irqrestore(scmd->device->host->host_lock, flags);
1032 }
1033
1034 return rtn;
1035}
1036
1037/**
1038 * scsi_eh_bus_reset - send a bus reset 1045 * scsi_eh_bus_reset - send a bus reset
1039 * @shost: scsi host being recovered. 1046 * @shost: scsi host being recovered.
1040 * @eh_done_q: list_head for processed commands. 1047 * @eh_done_q: list_head for processed commands.
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 06:26:55 -0500